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Note E - Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
  

Restricted Stock

 
  

Number of

Shares

  

Weighted-

Average Grant

Date Fair Value

 

Non-vested at January 1, 2020

  55,459  $24.35 

Granted

  63,182   36.46 

Canceled/forfeited/expired

  (11,714)  41.01 

Vested

  (36,184)  17.58 

Non-vested at September 30, 2020

  70,743  $35.86